Motorola

About: Motorola is a company organization based out in Schaumburg, Illinois, United States. It is known for research contribution in the topics: Signal & Communications system. The organization has 27298 authors who have published 38274 publications receiving 968710 citations. The organization is also known as: Motorola, Inc. & Galvin Manufacturing Corporation.

Thermally enhanced semiconductor device having exposed backside and method for making the same

Abstract: A thermally enhanced semiconductor device (10) having an exposed backside (22) is described. In one embodiment, a PC board substrate (12) is provided having a pattern of conductive traces (14) on both upper and lower surfaces of the substrate. Electrical continuity is maintained between the two surfaces with conductive vias (16). A semiconductor die (18) is flip-mounted to the upper surface of the substrate. Solder bumps (26) electrically connect the die to the conductive traces, and an underfill (28) couples the active side (20) of the die to the upper surface of the substrate. A package body (40) is formed around the perimeter (24) of the die leaving the inactive backside exposed for enhanced thermal dissipation. The inactive backside can also be coupled to a heat sink for increased thermal dissipation. A plurality of solder balls (42) electrically connected to the conductive traces is attached to the lower surface of the substrate.

Method and apparatus for antenna array channel feedback

Abstract: A method (800) and apparatus (500) provide antenna array channel feedback The method (800) can include receiving (820), at a wireless terminal (500), a set of channel state information reference signals The method (800) can include determining (830) a precoding matrix based on the received set of channel state information reference signals The precoding matrix can have a representation in terms of three components The first component of the three components can be determined from a first set of vectors The second component of the three components can be determined from a first set of parameters The third component of the three components can be determined from a second set of parameters The second set of parameters can be a set of unit-magnitude scalars The method (800) can include transmitting (840), by the wireless terminal (500), a representation of at least one of the first component, the second component, and the third component

Method and apparatus for encoding and decoding data

Abstract: A structured parity-check matrix H is proposed, wherein H is an expansion of a base matrix Hb and wherein Hb comprises a section Hb1 and a section Hb2, and wherein Hb2 comprises a first part comprising a column hb having an odd weight greater than 2, and a second part comprising matrix elements for row i, column j equal to 1 for i=j, 1 for i=j+1, and 0 elsewhere. The expansion of the base matrix Hb uses identical submatrices for 1s in each column of the second part H′b2, and the expansion uses paired submatrices for an even number of 1s in hb.

Active reduction of electric field generated by a transmit antenna via an auxillary antenna structure

Abstract: A wireless communication device and method includes an auxiliary antenna that can actively cancel at least a portion of a near-field component of an electric field generated by a main transmit antenna. The auxiliary antenna can help comply with specific absorption rate requirements and can reduce undesirable signal rectification in hearing aid components.